Martin Keown has called out David Luiz saying that he 'can't defend' in one-on-one situations.
The Arsenal man gave away another penalty in Sunday's 2-2 draw with Watford at Vicarage Road leading to criticism from the former Gunner.
Speaking on Match of the Day 2, Keown said emphasised the need for Unai Emery's side to manage the game better and try to ensure that they aren't left exposed at the back.
He said: "It's unbelievable.
"Arsenal are 2-1 up but they seem to be in a desperate mode to try and attack. Manage the game. There are five bodies in the box as Arsenal tried to get a third.
"It was really open, from one end to the other. The Arsenal defence don't come up to the problem.
"They melt away and drop and get ever closer to their penalty box. And David Luiz in a one-on-one situation just cannot defend, that's end of, and they know that too.
"He draws the foul and that's the penalty. Arsenal throwing away vital points here. You've got to adjust. That's work on the training ground. That's shocking to see."
